Demonstration in favour of the cricket match (7)
I believe the answer is:
protest
'demonstration' is the definition.
(I know that demonstration can be written as protest)
'in favour of the cricket match' is the wordplay.
'in favour of' becomes 'pro' (being pro a particular cause).
'the cricket match' becomes 'test' (a test is a kind of cricket match).
'pro'+'test'='PROTEST'
(Other definitions for protest that I've seen before include "State objection" , "Express disagreement" , "Record objection" , "Take exception" , "Express dissent" .)